An Etymological Dictionary of Astronomy and Astrophysics

1. To impart → knowledge of a fact or circumstance.
   

2. To supply (oneself) with knowledge of a matter or subject (dictionary.com).
   

3. To convey → information.
   

See also: → informatics, → information theory.

Etymology (EN): Inform, from M.E. informen, from O.Fr. enformer, from L. informare “to shape, form; to form an idea of,” from → in- “into” + → forma “form.”

Etymology (PE): Azdâyidan, from Mid.Pers. azdênidan “to inform,” from azd “information, proclamation; known” (loaned into Arm. azd), from O.Pers. azdā “known,” azdā kar “to become known;” Av. azdā “known;” Sogdian ‘zd’ “informed, known;” cf. Skt. addhā’ “manifestly; certainly, truly,” addhāti “sage.”